Approximately how long will a liquid oxygen reservoir last when supplying 3 L/min to your pa-tient? The current reservoir weight is 20 lb, and the weight of an empty reservoir is 10 lb

a. 19 hours c. 46 hours
b. 38 hours d. 119 hours

ANS: A
Subtract 10 lb from 20 lb = 10 lb. Convert 10 lb/2.5 lb/L= 4 L. 4 ? 860 = 3440 L. Then divide by the flow 3440 L/3 L/min = 1146 minutes, or 19 hours.

Health Professions

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